Quit flagellating yourself and learn how to use a camera... ISO is the last thing you should adjust when in the 1% of your shots you can't adjust your exposure value or your F/stop to get the shot that you want.

There are too many people on DPreview who don't know how to use a camera... let the lens do the heavy lifting, not the body...

So many people run around in circles like my dog does when it greets someone at the door....

ZOMG I CAN SHOOT AT ISO64000 ZOMG MY CAMERA IS AMAZING!!!!

Plonkers...

Most photographers obsessed with high ISO are young and inexperienced.